120mm FAN spacer 50mm ASIC miner

For rear side 120mm cooler ASIC miner Antminer, Ebit, Whatsminer and other.
Is placed between the case and the fan, for better cooling of the middle board and rear chips, removes the air hole from the fan motor.
The temperature of the hottest chips will be 3-7C lower.
You can buy ready-made and improved designs at mskminer.com.